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Cantatore et al: Submucosal resection via a transanal approach for treatment of epithelial rectal tumors – a multicenter study
Veterinary Surgery 3, 2022

🔍 Key Findings

  • Submucosal resection via a transanal approach was associated with a low rate (1.1%) of major complications and prolonged survival across benign and malignant rectal tumors.
  • Overall recurrence rate was 21.5%, with higher recurrence in malignant tumors: 28.6% (carcinomas) and 30.4% (carcinoma in situ) vs. 13.6% (adenomas).
  • Complications (P = .032) and incomplete margins (P = .023) were independently associated with increased recurrence risk.
  • Recurrence was the only factor associated with increased risk of tumor-related death (P = .046).
  • Repeat submucosal resection was successful in 60% of dogs with recurrence, indicating feasibility of this as a salvage approach.
  • 1-, 2-, and 5-year survival rates for carcinomas were 95%, 89%, and 73%, though overall survival was significantly longer for benign tumors (P = .001).
  • Preoperative diagnostics (FNA, biopsy) were often inconsistent with final histopathology – only 64.3% biopsy agreement.
  • Presurgical imaging was not consistently performed, limiting accurate staging in many dogs.

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← Articles

Cantatore et al: Submucosal resection via a transanal approach for treatment of epithelial rectal tumors – a multicenter study
Veterinary Surgery 3, 2022

🔍 Key Findings

  • Submucosal resection via a transanal approach was associated with a low rate (1.1%) of major complications and prolonged survival across benign and malignant rectal tumors.
  • Overall recurrence rate was 21.5%, with higher recurrence in malignant tumors: 28.6% (carcinomas) and 30.4% (carcinoma in situ) vs. 13.6% (adenomas).
  • Complications (P = .032) and incomplete margins (P = .023) were independently associated with increased recurrence risk.
  • Recurrence was the only factor associated with increased risk of tumor-related death (P = .046).
  • Repeat submucosal resection was successful in 60% of dogs with recurrence, indicating feasibility of this as a salvage approach.
  • 1-, 2-, and 5-year survival rates for carcinomas were 95%, 89%, and 73%, though overall survival was significantly longer for benign tumors (P = .001).
  • Preoperative diagnostics (FNA, biopsy) were often inconsistent with final histopathology – only 64.3% biopsy agreement.
  • Presurgical imaging was not consistently performed, limiting accurate staging in many dogs.

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Multiple Choice Questions on this study

In Cantatore 2022 et al., on transanal submucosal resection, what was the major complication rate following surgery?

A. 0%
B. 1.1%
C. 10%
D. 21.5%
E. 43%

Answer: 1.1%

Explanation: Only 1 of 93 dogs experienced a major complication requiring surgical revision.
In Cantatore 2022 et al., on transanal submucosal resection, what were the 5-year survival rates for dogs with rectal carcinoma treated by this method?

A. 100%
B. 89%
C. 80%
D. 73%
E. 60%

Answer: 73%

Explanation: The 5-year overall survival rate for carcinomas was 73% based on Kaplan-Meier estimates.
In Cantatore 2022 et al., on transanal submucosal resection, which of the following was independently associated with increased recurrence risk following surgery?

A. Surgical time > 60 minutes
B. Use of preoperative biopsy only
C. Use of non-absorbable suture
D. Incomplete surgical margins
E. Age > 10 years

Answer: Incomplete surgical margins

Explanation: Incomplete margins were independently associated with recurrence (P = .023).
In Cantatore 2022 et al., on transanal submucosal resection, what factor was most strongly associated with increased risk of tumor-related death?

A. Histologic tumor grade
B. Age of the patient
C. Tumor size
D. Recurrence of the tumor
E. Type of anesthesia used

Answer: Recurrence of the tumor

Explanation: Recurrence was the only variable significantly associated with tumor-related death (P = .046).
In Cantatore 2022 et al., on transanal submucosal resection, what proportion of dogs with recurrence were successfully treated with a repeat submucosal resection?

A. 20%
B. 40%
C. 60%
D. 80%
E. 100%

Answer: 60%

Explanation: 12 of 20 dogs (60%) with recurrence underwent repeat submucosal resection.

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